What is the antonyms of brilliant?

The antonyms of "brilliant" depend on the context in which it is used. Here are some possibilities:

If "brilliant" refers to intelligence or talent:

* Stupid

* Dull

* Unintelligent

* Mediocre

* Uninspired

* Clueless

* Dim-witted

If "brilliant" refers to brightness or luminosity:

* Dark

* Dim

* Faint

* Gloomy

* Shadowy

* Muddy

If "brilliant" refers to outstanding or exceptional:

* Mediocre

* Ordinary

* Average

* Subpar

* Unremarkable

* Inferior

If "brilliant" refers to colorful or vibrant:

* Drab

* Pale

* Bland

* Monotone

* Lackluster

It's important to consider the specific context to choose the most appropriate antonym.